Steam-boiler and its setting.



PATENTED MAR. 3l, 1903.

l H. M. ASHLEY. STEAM BUTLER AND ITS SETTING.

APPLICATION FILED JULY 26, 1901.

HO MODEL.

2 SHEETS-SHEET 1l Tn: nomme Farms co, mom mmc.. msnm-.mn

v No. 723,805. PATENTED MAR. 3l, 1903.

. H. M. ASHLEY.

STEAM BOILER AND ITS SETTING.

APPLICATION FILED JULY ZB, 1901.'

No MODEL. 2 SHEETS- SHEET 2.

MM50: Iwan/Z021 NrrnD STATES PATENT FFICE.

HOWARD MATRAVERS ASHLEY, OF FERRYBRIDGE, ENGLAND.

STEAM-BOILER AND ITS SETTING.

SPECIFICATION-forming part of Letters Patent No. 723,805, dated March 31, 1903.

Application filed July 26, 1901.

To all whom it may concern: l

Be it known that I, HOWARD MATRAVERS ASHLEY, a citizen of England, residing at Ferrybridge Foundry, Ferrybridge, in the county of York, England, have invented certain new and useful Improvements in Steam- Boilers and Their Settings, (for Which I have applied for a patent in Great Britain, dated December 27, 1900, No. 23,683,) of which the following is a specification.

My invention relates to Cornish boilers, or such as have a single longitudinal fire-line, and to Lancashire vboilers, which have two such iiues, and has for its object to insure a more effective action of the iame and hot gases and to provide for combustion of smoke.

I shall describe these improvements, referring to the accompanying drawings, in all the` Afigures of which like reference letters and numerals are employed to indicate like parts.

Figure l is a side elevation, Fig. 2 a plan, Fig. 3 a front elevation, Fig. 4 a back elevation, and Fig. 5 a transverse section, of a Lancashire boiler With my improvements applied thereto. Fig. 6 is a longitudinal section of part of a boiler; and Fig. 7, a transverse section through 7 7, showing my improvements applied to a Cornish boiler.

Referring first to Figs. 1 to 5 of the drawings, the boiler B has two longitudinal lirei'lues A A, each of Whichis provided with tubes C C on their outer sides, the openings of which extend from near the crown of the re-flues obliquely upward through the shell of the boiler to near the top of the side dues D D', which are primarily of the usual construction. I divide these side flues by partitions E, which extend down under the boiler, thusforming the flue into separate com partments. These partitions are built with an inverted-V edge and serve both as a support for the boiler and as guides to the flame or heated gases, compelling these to pass circumferentially instead of longitudinally over the outer surface of the boiler. The partitions may be of any number and any distance apart; but l prefer to place the first partition at about the same distance back as the usual bridge formed at the back of the furnaces.

At the front end of the boiler are provided fire-doors H I-I, mounted loosely on vertical spindles T, to which are also fixed the ash-pit or draft-hole doorsG G'. At the top these Serial No. 6 9| 8 3 3 (No model.)

spindles carry slotted levers I, in the slots of which slide adjustingpins J, which can be fixed in certain positions by lock-nuts 4 and are attached to connecting-rods K, passing to the other end of the boiler and there connected with a lever L, fixed on a pivot M, carrying an L-shaped valve N. It will be seen that by means of this arrangement the ashpit or draft-hole doors can be so set as to close or partly close alternately and in such a manner that when the draft-hole door of the one furnace is open the back of its flue is closed, while the draft-hole door of the other furnace is closed and the back of its Aiiue is open, and vice versa. -The partitions E are provided with manhole-doors or movable parts O to enable the lines to be cleaned.

The operation of a boiler constructed as above is as follows: Assuming that the righthand furnace in Ais being stoked and the draft-hole door Gl` is open, then by means of the pivots T, connecting-rods K, and pivot M .the L-shaped valve N at the rear end of the flue is placed in such a position as to close that flue and leave the other flue open to the chimney-shaft. The result of this is that the iiam'e and heated gases, not being able to escape at the rear end of the flue, are forced through the side tubes C' into the ues D and, are caused to travel circumferentially around theboiler into the iiue D and then enter by the tubes C into the other flue A onto the top of the incandescent fire, causing this re to consume the smoke of the newlyfed fire. This can only be accomplished b y having the usual hot-air chambers fixed at the back of the fire-doors,which pass a large amount of heated air through each furnace alternately to mix with the smoke and escaped gases over the incandescent fire at -the f boiler, I provide a row of tubes C C C2 Cien' each side, extending from near the crown of the flue through the shell of the boiler to neary I divide the top of the usual side iiues D.

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these side lues by partitions E E E2 E3,Which extend down under the boiler and serve as a support for the same, and each alternate partition is provided with openings P P'. In the fire-flue I also build partitions Q, the first one at the end of the tire-grate and each alternate one being made to close the iiue entirely, while the others have openings at their bottoms. This arrangement of partitions E and the partitions Q in the tireue and of their openings causes the flame and hot gases from the fire to take the following course: First, as they are stopped by the partition Q from passing along the fire-flue they pass out by the tubes C to the side fines D and descend circumferentially around the boiler to the bottoin,where they pass through the opening P in the partition E. Being prevented from passing along this flue by the closed partition E', they ascend again by the side dues D and pass by the tubes C' into the fire-flue. Passing some distance along it, they meet the partition Q and pass under the opening at the bottom into the next space of the tire-Hue, where they meet another closed partition Q2, which causes them to pass out of the next set of tubes C2 into the [lues D again. From here they pass through the opening P into the next compartment, and being again stopped by the closed partition E3 they ascend again by the side lues D and pass by the tu bes C3 into the fire-Hue, and so on along the Whole length of the boiler until they escape by the smoke-jack or uptake. It will be seen that by this arrangement of passages and tubes the flame and heated gases are made to pass circumferentially over both the outer surface of tbe boiler and the inner surface of the fire-Hue instead of longitudinally along these surfaces.

`I prefer to arrange boilers of the Cornish type in pairs whenever possible and to fire the two boilers alternately, making both fines meet in a common'chamber where the smoke, llame, and products of combustion from the flue last tired meet the incandescent flames and gases from the other. This assists in oonsulning the smoke arising from fresh stoking.

Having thus described the nature of this invention and the best means I know of carrying the same into practical effect, I claim- `l. A horizontal boiler having one or more longitudinal flues and laterally extending fire-tubes, in communication with each other, in combination with a setting for the same having side and bottom fiues with which said fire-tubes communicate, transverse partitions dividing said side and bottom fines into sections, a fire-box or tire-boxes at the front end of the boiler, an uptake at its rear end, and means for interrupting the direct draft,where by the combustion products are made to pass back and forth beneath the boiler from side to side thereof.

2. The combination, in a horizontal cylindrical boiler and its setting, of a tire-box at the front end of the boiler, a longitudinal iue and lateral fire-tubes within the boiler in commu nication with each other,circumjacent lines formed by the setting, partitions dividing said circumjacent fines into circumferential sections in communication with such firetubes respectively, and an uptake at the rear end of the boiler.

3. The combination, in a boiler and its setting, of a pair of fire-boxes side by side Within the boiler, an uptake common to both, tlues connecting the respective tire-boxes with the uptake, tlues extending from side to side beneath the boiler, fire-tubes connecting the respective fire-boxes with the iues last named, and means for interrupting the direct draft from either fire box at will, whereby the smoke and unconsumed gases from either lire-box may be made to pass beneath the boiler and into the other re-box above an incandescent tire in the latter for the combustion of such smoke and unconsumed gases.

4. The combination, in a boiler and its setting, of a pair of tire-boxes at one end, directdraft fiues within the boiler in communication with the respective re-boxes, ues external to the boiler, lateral fire-tubes connecting the respective direct-draft lines with said external lilies, an uptake common to said direct-draft iiues, and means for interrupting the direct draft from either lire-box at Will.

5. The combination, in a boiler and its setting, of a pair of fire-boxes at one end, directdraft flues within the boiler in communication with the respective fire-boxes, flues external to the boiler, partitions dividing said external dues into sections, lateral fire-tubes connecting the respective direct-draft iiues with successive sections of said external flues,

an uptake common to said direct-draft lues,

and means for interrupting the direct draft from either fire-box at will.

G. The combination, in a boiler and its setting, of a pair of fire-boxes at one end, directdraft ues within the boiler in communication with the respective tire-boxes, iiues external to the boiler, partitions dividing said external flues into sections, lateral fire-tubes connecting the respective tire-boxes and the respective direct-draft flues with successive sections of said external flues, an uptake common to said direct-draft flues, movable furnace-doors at the lire-box end, valves at the opposite end ofthe direct-draft lues,and connections between the respective valves and furnace-doors arranged to close the directdraft Iiue corresponding with the fire-box Whose door is open and to open the directdraft Iiue whose fire-box is closed, substantially as hereinbefore specified, and for the purposes set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HOWARD ilIA'lRAVERS ASHLEY.

Witnesses:

EDWARD GARDNER, GERALD L. SMITH. 

